89 lines
2.8 KiB
Python
89 lines
2.8 KiB
Python
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import sys
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import os
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from PIL import Image, ImageDraw, ImageFont
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import tempfile
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class Label():
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pixels_x = 155
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pixels_y = 106
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bg_color = (255, 255, 255)
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def __init__(self, skip_create = False):
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me_path = os.path.dirname(__file__)
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self.bold_font_fname = os.path.join(me_path, 'OpenSans-Bold.ttf')
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self.regular_font_fname = os.path.join(me_path, 'OpenSans-Regular.ttf')
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if not skip_create:
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self.create()
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def create(self):
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self.img = Image.new('RGB', (self.pixels_x, self.pixels_y), color=self.bg_color)
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def draw_text(self, text : str, pos_x, pos_y, color=(0,0,0), size=10, font_file=None, centered=False, scale_to_fit=False):
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d = ImageDraw.Draw(self.img)
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if font_file is None or font_file == 'regular':
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font_file = self.regular_font_fname
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elif font_file == 'bold':
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font_file = self.bold_font_fname
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font_fits = False
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orig_size = size
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orig_pos_x = pos_x
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orig_pos_y = pos_y
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while not font_fits:
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fnt = ImageFont.truetype(font_file, size)
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w, h = d.textsize(text, font=fnt)
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if centered:
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pos_x = orig_pos_x - w / 2
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pos_y = orig_pos_y - h / 2
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else:
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pos_x = orig_pos_x
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pos_y = orig_pos_y
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if not scale_to_fit:
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font_fits = True
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break
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if pos_x >= 0 and pos_x + w <= self.pixels_x:
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font_fits = True
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else:
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size = size - 1
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if size != orig_size:
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print('Rescaled font to size:', size)
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d.text((pos_x, pos_y), text, font=fnt, fill=color)
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def save(self, fname = None):
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"""
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Save Label to file. If no fname is supplied, a tempfile is created and its filename is returend
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"""
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if self.img is None:
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raise Exception('Must create image first')
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if fname is None or fname == '':
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fobj = tempfile.mkstemp(suffix='.png', prefix='label_', text=False)
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with os.fdopen(fobj[0], mode="w+b") as file:
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self.img.save(file, format='PNG')
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fname = fobj[1]
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else:
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self.img.save(fname)
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return fname
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class MiceToiletLabel(Label):
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pixels_x = 155
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pixels_y = 106
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def __init__(self):
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super().__init__(skip_create=True)
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self.create()
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def put_text(self, heading, line1=None, line2=None):
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self.draw_text(heading, self.pixels_x/2, 20, size=25, font_file='bold', centered=True, scale_to_fit=True)
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if line1:
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self.draw_text(line1, self.pixels_x/2, 55, size=20, centered=True, scale_to_fit=True)
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if line2:
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self.draw_text(line2, self.pixels_x/2, 85, size=20, centered=True, scale_to_fit=True)
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